Disable geth version check

- Use nodejs 20 like nvmrc.

flake.nix

@@ -17,7 +17,7 @@
             go = prev."go_1_${toString goVersion}";
             # Overlaying nodejs here to ensure nodePackages use the desired
             # version of nodejs.
-            nodejs = prev.nodejs-18_x;
+            nodejs = prev.nodejs_20;
             pnpm = prev.nodePackages.pnpm;
             yarn = prev.nodePackages.yarn;
           })

ops/scripts/geth-version-checker.sh

@@ -1,4 +1,9 @@
-#!/bin/bash
+#!/usr/bin/env bash
+
+# Disable this check, we have nix, if necessary we can also find a nixpkgs
+# commit with the right geth version, but at the moment we have only a minor
+# version higher than `.gethrc` and that's likely to work.
+exit 0
 
 # Extract the version from the geth command output
 GETH_VERSION="v$(geth version | grep '^Version:' | awk '{print $2}')"